This is a list of the complete squads for the 2019 Six Nations Championship, an annual rugby union tournament contested by the national rugby teams of England, France, Ireland, Italy, Scotland and Wales. Ireland were the defending champions.
Note: Number of caps and players' ages are indicated as of 1 February 2019 – the tournament's opening day. For players added to a squad during the tournament, their caps and age are indicated as of the date of their call-up.